Commit 23b97c7e authored by Yang Jihong's avatar Yang Jihong Committed by Arnaldo Carvalho de Melo
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perf test: Add test case for record sideband events 



Add a new test case to record sideband events for all CPUs when tracing
selected CPUs

Test result:

  # ./perf test list 2>&1 | grep 'perf record sideband tests'
   95: perf record sideband tests
  # ./perf test 95
   95: perf record sideband tests                                      : Ok

Signed-off-by: default avatarYang Jihong <yangjihong1@huawei.com>
Tested-by: default avatarRavi Bangoria <ravi.bangoria@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20230904023340.12707-6-yangjihong1@huawei.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 74b4f3ec

tools/perf/tests/shell/record_sideband.sh

0 → 100755
+58 −0
Original line number Diff line number Diff line 
#!/bin/sh

# perf record sideband tests

# SPDX-License-Identifier: GPL-2.0



set -e



err=0

perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)



cleanup()

{

    rm -rf ${perfdata}

    trap - EXIT TERM INT

}



trap_cleanup()

{

    cleanup

    exit 1

}

trap trap_cleanup EXIT TERM INT



can_cpu_wide()

{

    if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true 2>&1 >/dev/null

    then

        echo "record sideband test [Skipped cannot record cpu$1]"

        err=2

    fi



    rm -f ${perfdata}

    return $err

}



test_system_wide_tracking()

{

    # Need CPU 0 and CPU 1

    can_cpu_wide 0 || return 0

    can_cpu_wide 1 || return 0



    # Record on CPU 0 a task running on CPU 1

    perf record -BN --no-bpf-event -o ${perfdata} -C 0 -- taskset --cpu-list 1 true



    # Should get MMAP events from CPU 1

    mmap_cnt=`perf script -i ${perfdata} --show-mmap-events -C 1 2>/dev/null | grep MMAP | wc -l`



    if [ ${mmap_cnt} -gt 0 ] ; then

        return 0

    fi



    echo "Failed to record MMAP events on CPU 1 when tracing CPU 0"

    return 1

}



test_system_wide_tracking



cleanup

exit $err